1203.5163 (W. J. Zhang et al.)

Transport Measurements on Nano-engineered Two Dimensional
Superconducting Wire Networks    [PDF]

W. J. Zhang, S. K. He, H. Xiao, G. M. Xue, Z. C. Wen, X. F. Han, S. P. Zhao, C. Z. Gu, X. G. Qiu

Superconducting triangular Nb wire networks with high normal-state resistance are fabricated by using a negative tone hydrogen silsesquioxane (HSQ) resist. Robust magnetoresistance oscillations are observed up to high magnetic fields and maintained at low temperatures, due to the eective reduction of wire dimensions. Well-defined dips appear at integral and rational values (1/2, 1/3, 1/4) of the reduced flux f = Phi/Phi_0, which is the first observation in the triangular wire networks. These results are well consistent with theoretical calculations for the reduced critical temperature as a function of f.

View original: http://arxiv.org/abs/1203.5163